Improvement in steam-generators



.m NT M m E M m Patented Jan. 10, 1871.

'-thereoi', which will enable others skilled in the art the vertical tubes A.

than solo MIRABEAU N. LYNN, OF NE LBANY, INDIANA.

. Letters Patent No. 110,862, dated January 10', 1871.

IMPROVEMENT lN STEAM-GENERATORS.

The Schedule refund to in these Lettcn Patent and making part of the lame.

To all whom it may concern Be it known that I, MIRABEA'U N. LYNN. of New Albany, in the county of Floyd and State of Indiana, have invented a new and useful Improvement in StcaniGcn'e1'ators; and I do hereby declare that the following is a full, clear, and exact description to make and use the same, reference being had to the accompanying drawing forming part of this specification.

This invent-ion relates to new and useful improve-- ments in the construction of sectional vertical boil- 01s of tubes; and consists in the square .vertical or. othcrJormed shell of tubes placed side by side and connected at the ends to short large tubes, connected at their ends and arranged to form a figure corresponding in form to the cross-section ofthe-boiler to be made, part of the said tribes forming the shell being provided at the inside with circulating-tubes, connected to them at both ends and projecting into the space above the fire, and the large transverse tubes at the ends being connected at the ontside'with re turn tubes for the promotion of'the circulation, by allowing the water to return to the bottom-of the tubes ibrming' the case, and the case being covered by a coil of feed-water and exhaust-pipes, which protect it and take tip-and utilize the heat given oil by the shell.

The invention also comprises an improved mode of" joining the vertical and transverse tubes, as herein-. after more fully specified.

Figure 1 represents avcrtical sectional elevation of my improved boiler.

-l lgure 2 represents another sectional elevation, taken in a plane at right-angles to that of fig. 1.

Similar letters of reference indicate corresponding parts.

A represents the vertical tubes forming the sides of the shell. 4

They are placed side by side as closely as can be, and cooncctcd at the bottom'to the transverse tubes B, at the sides thereof, by the tubularscrew-threaded plugs Lscrcwing from the inside of the tubes B, through the sides, into the sides of the said tubes A.-

lhesaid tubular plugs are closed at the outer ends by the plugs O, screwing through holes in the outer sides of tubosli, and have lateral holcs,-l), in the sides, to cause the water in the tubes B to flow in the direction of the latter in passing in and out of The upper ends of the tubes A support the large .atcral tubes 1' and are connected to them by simiscrew-plugs G, screwed in through holes in the upper sides of the large tubes E.

These large tubes 1) constitute the steam-dome, and are connected by the curved tubes H toa superheater, I, arranged in a hood, K, fitted on ,the top of the boiler.

The transverse tubes 13 and E maybe made'wholc by casting; or, it made of rolled and lap welded metal, they may be connected at the ends by rivets or otherwise.

The tubes A, constituting two opposite sides of the shell, 'haveatthe inside a number of circulatingtubes, L, connected at both cndsto them and bent outward iutot-he space above the fire, to be acted onby the heat rising upin the said space.

For convenience in attaching these tubes to the for convenience in making the opening for feeding the fire, which may be made wholly in the said flattened tnbe more easily than if the tubes are smaller, which would require some to be wholly cut olii'cither wholly preventing the circulation in them, or requir ing them tobc connected laterally with others.

I propose to encircle the case or shell formed by the tubes A by one or more coils, M, to be used for the feed-water, and for exhausting the-steam into to:

condense it and return it with the fced-water, so as to utilize the heat radiating fromthe shell as much as possible.

Outside of the coils M heat-retaining packing, T,

oifauy approved kind, may be applied.

and at the top thereof, for the purpose of conveying the products of combustion to the hood K. 'From thence they are transferred to the smoke-stack.

It will be observed that, by removing the plugs G .1 and thestop-plugs C G, the tubes A together with the tubcs L belonging to them, may be taken outand detached for the connection of others.

I am aware that circulating-tubes projectiuglintolar hollow plu s, F, closed at the upper ends by the the tire-place and higher, with lower points, are not tubes A, by screwingthem at each end into the;

A broad, flattened tube maybe placed in one side,'

A short flue, S, is located between the tubes E,

others substituted, and the tubes L may be readiy 2 in themselves new, and I therefure do not desire to 3. The connection of the tnb'es A. and B or E by claim them as any part of my invention. means of the tubular screw-tln'eaded plugs 0 or 1", Having thus described my-invention, plugged at the outer emls by the plugs O G, and I claim as new and desire to secure by Letters having the lateral orifices, substantially as specified. .'atent- MIRABEAU N. LYNN.

1. The combination of the tubes A and transverse *nhes B and E, and the interior circnlating-tnbes L, Witnesses:

.rrangeil substantially as specified. JOHN H. STOTSENBUBG,

2. The combination with the above of the water- THOMAS M. BROWN.

return mi es 0, substantially as specified. 

